147 years old now in 2021 - what year born?


Today, 1 August 2021 if a person is 147 years old now, what year was he born? See below:


If 147 years old, year of birth is:
1873 or 1874*
*It depends on whether he was born before or after 1 January 1874.


If now 147 years and his year of birth 1873 if he was born after 1 August 1873 until 31 december 1873 inclusively, and his year of birth is 1874 if he was born from 1 January 1874 to 1 August 1874.


Other examples:

If now 7 years, year of birth 2013 or 2014
If now 16 years, year of birth 2004 or 2005
If now 18 years, year of birth 2002 or 2003
If now 83 years, year of birth 1937 or 1938

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